What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows ?

Options

(a) Green plants seek light because they are phototropic
(b) Light stimulates plant cells on the lighted side to grow faster
(c) Auxin accumulates on the shaded side,stimulating greater cell elongation there
(d) Greenplants need light to perform photosynthesis

Correct Answer:

Auxin accumulates on the shaded side,stimulating greater cell elongation there

Explanation:

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